Recently, much attention has been paid to Permian shale from the Yangtze Platform because of the high–quality hydrocarbon source rock. This research investigates fracture veins derived from conventional cores of the Permian Leping Formation in the Pingle Depression, Lower Yangtze Platform. Based on petrographic observations, micro–Raman spectroscopy, and fluorescent spectrometry, hybrid CH₄–C₂H₆ gas inclusions, pure CH₄ inclusions, dissolved CH₄ aqueous inclusions, and different abundant blue-green fluorescence petroleum inclusions were discovered in quartz and calcite. The pressure–temperature–time–composition properties of the CH₄–bearing inclusions were obtained by quantitative Raman analysis and thermodynamic models. The pore fluid pressure (59.05–87.78 MPa) calculated from Raman shift of C–H symmetric stretching (v₁) band of methane indicates inclusions trapped at close to lithostatic pressures, which can provide a key evidence for understanding the formation and evolution of overpressure. PT entrapment conditions, reconstruction of hydrocarbon generation and simulation of burial history permit to constrain accumulation time sequence of paleo-fluid in shale veins. Blue-green fluorescence with high-mature petroleum fluid trapped in late Cretaceous (~81–71 Ma); hybrid CH₄–C₂H₆ fluid trapped in early Paleogene (~68–61 Ma); and CH₄ fluid trapped in Paleogene (~62–51 Ma). Dry gas generation period close to the age of maximum burial depth at early Himalayan uplift period.

近年来，由于高质量的烃源岩，长江平台对二叠纪页岩的关注度很高。本研究调查了下扬子平台平乐凹陷二叠系乐平组常规岩心的断裂脉。根据岩石学观察，显微拉曼光谱和荧光光谱法，在石英和石英中发现了杂化CH ₄ –C ₂ H ₆气体夹杂物，纯CH ₄夹杂物，溶解的CH ₄含水夹杂物和不同的丰富的蓝绿色荧光石油夹杂物。方解石。CH ₄的压力-温度-时间-组成特性通过定量拉曼分析和热力学模型获得了含轴承夹杂物。由甲烷的C–H对称拉伸（v ₁）带的拉曼位移计算得出的孔隙流体压力（59.05–87.78 MPa）表明夹杂物夹杂在接近岩石静压力的位置，这可以为理解超压的形成和演化提供关键证据。 。PT截留条件，油气成藏的重建和埋藏历史的模拟，可以限制古流体在页岩静脉中的堆积时间顺序。蓝绿色荧光，并在白垩纪晚期（〜81–71 Ma）捕获了成熟的石油流体；CH ₄ –C ₂ H ₆混合流体滞留在古近纪早期（〜68–61 Ma）；和CH ₄流体滞留在古近纪（〜62–51 Ma）。在喜马拉雅隆升早期，干气产生期接近最大埋藏深度年龄。